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mechanical (chewing, swallowing and peristalsis ie. breaks down food and moves it along digestive tract), chemical (enzyme action, reduces large molecules to smaller ones for absorption through organ wall for transportation to cells), protein (happens in stomach and then in small intestine), carbohydrate (happens in mouth then stomach then mainly in small intestine), fat (bile emulsifies fats, no enzymes are involved unlike every other digestion)

rectal bleeding and passing of mucus are refer to GP situations, unhealthy levels of stress affect digestion and absorption, acute conditions are contra-indicated

ingestion (eating), transportation (peristalsis, food in and waste out), digestion and absorption (physical and chemical breakdown and absorption of food), excretion/defaecation (eliminates solid and other wastes ie. remains after digestion)